<b xmlns:tools="http://schemas.android.com/tools">Update period for location (Location 0)</b> - you can set update period for location 0 - location 0 has the ability to update location according to cell-, Wi-Fi networks and GPS. When you select update <i xmlns:tools="http://schemas.android.com/tools">By accelerometer</i> the app uses that to detect movement. From this, distance is calculated. When the distance limit is reached, and no update has happened in 15 minutes, the location and current weather is updated. When the app can not fetch location, you can see unknown location label in the widget. When the app has no location state, it will try again in 5 minutes. You can also select location update based on time intervals in <b xmlns:tools="http://schemas.android.com/tools">Update period for weather (Location 1,2,3...)</b> - where you can set weather to update for manually discovered locations.